Timing on an 0-360

I've searched the forum for knowledge and have found many related threads but here's my direct question: What sgould the timing be on an O-360 carbed engine with LASER Ignition and 9 to 1 compression?

On my engine data plate it says 25 BTDC. So on my stock O-360 carburated 180HP, it would be 25 degrees. But since I added LASER ignition and slightly higher compression....is 20 a better number?

I'm chasing slightly higher than average CHT's, highest in #2, and this conversation about timing came up. What do you experts think in the VAFsphere?

Thanks for your opinions in advance!

Thanks Mike. That's one of the threads I read, came away still not sure what THE answer is. I guess thus is life in the experimental world.....